EP1708060A3 - Controller for injection molding machine - Google Patents

Controller for injection molding machine Download PDF

Info

Publication number
EP1708060A3
EP1708060A3 EP06251306A EP06251306A EP1708060A3 EP 1708060 A3 EP1708060 A3 EP 1708060A3 EP 06251306 A EP06251306 A EP 06251306A EP 06251306 A EP06251306 A EP 06251306A EP 1708060 A3 EP1708060 A3 EP 1708060A3
Authority
EP
European Patent Office
Prior art keywords
motion
velocity
control
injection
command
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06251306A
Other languages
German (de)
French (fr)
Other versions
EP1708060A2 (en
EP1708060B1 (en
Inventor
Tatsuhiro Uchiyama
Junpei c/o Fanuc Dai3virakaramatsu Maruyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Publication of EP1708060A2 publication Critical patent/EP1708060A2/en
Publication of EP1708060A3 publication Critical patent/EP1708060A3/en
Application granted granted Critical
Publication of EP1708060B1 publication Critical patent/EP1708060B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/404—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42094—Speed then pressure or force loop
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/45—Nc applications
    • G05B2219/45244—Injection molding

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

A controller of an injection molding machine which compensates a delay in an injection velocity changeover and a delay at the time of changeover to the pressure-holding process, and is capable of more accurate and stable injection velocity control and changing control from the injection velocity control to pressure control. In the injection process, a motion command is outputted in every sampling period τ according to the command injection velocity. When a screw position overshoots the set velocity changeover positions Psw(2) and Psw(1), a motion command based on a velocity command of the next interval is outputted from the next period. However, there is time lag between the point when the set changeover position is reached and the point when the motion command is changed after detection thereof. There generates a motion deficiency in a motion amount shown by mark A and overshoot shown by B. Motion commands of the next period or the next and subsequent several periods are compensated with errors in the motion amount caused by the time lag used as compensation amounts A' and B'. The generated error motion amount is immediately compensated, which enables accurate velocity changing control. By performing the compensation in the same manner when the injection velocity control is switched to the holding pressure control, it is possible to suppress the peak pressure and the dispersion.
EP06251306A 2005-03-28 2006-03-13 Controller for injection molding machine Active EP1708060B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005092500A JP4168039B2 (en) 2005-03-28 2005-03-28 Control device for injection molding machine

Publications (3)

Publication Number Publication Date
EP1708060A2 EP1708060A2 (en) 2006-10-04
EP1708060A3 true EP1708060A3 (en) 2010-01-06
EP1708060B1 EP1708060B1 (en) 2012-02-29

Family

ID=36180094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06251306A Active EP1708060B1 (en) 2005-03-28 2006-03-13 Controller for injection molding machine

Country Status (4)

Country Link
US (1) US7344369B2 (en)
EP (1) EP1708060B1 (en)
JP (1) JP4168039B2 (en)
CN (1) CN100515725C (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4199270B2 (en) * 2006-08-08 2008-12-17 ファナック株式会社 Numerical control device and numerical control method for switching between position control and pressure control
JP4199284B1 (en) * 2007-06-05 2008-12-17 ファナック株式会社 Injection molding machine
CN101830059B (en) * 2010-04-20 2012-12-26 浙江大学 Method for controlling injection speed of screw of injection molding machine
EP2714363A4 (en) * 2011-05-27 2015-04-08 Husky Injection Molding Injection molding process
CN102431136B (en) * 2011-09-16 2014-11-05 广州市香港科大***研究院 Multi-phase batch process phase dividing method based on multiway principal component analysis method
CN103835008A (en) * 2012-11-20 2014-06-04 吴江市利群纺织有限公司 Melt pressure control device of screw extruder
JP2014124827A (en) * 2012-12-26 2014-07-07 Polyplastics Co Injection pattern simulation method of molten resin material, and resin molded articles-manufacturing method using this method
DE102014002983A1 (en) 2013-03-04 2014-09-04 Fanuc Corporation Control of an injection molding machine
BE1021675B1 (en) * 2013-04-26 2016-01-05 Gb Boucherie Nv INJECTION MOLDING
WO2015031989A1 (en) * 2013-09-05 2015-03-12 Husky Injection Molding Systems Ltd. A method and system for generating, processing and displaying an indicator of performance of an injection molding machine
JP2016129952A (en) 2015-01-13 2016-07-21 ファナック株式会社 Compression control device for injection molding machine
JP6346128B2 (en) * 2015-07-28 2018-06-20 ファナック株式会社 Injection molding system and machine learning device capable of calculating optimum operating conditions
JP6639997B2 (en) * 2016-03-31 2020-02-05 住友重機械工業株式会社 Injection molding machine
TWI608879B (en) * 2016-12-12 2017-12-21 精湛光學科技股份有限公司 Forging forming apparatus, adjusting management module thereof, adjusting method for forging apparatuses, computer program product with stored programs, and computer readable medium with stored programs
WO2019014749A1 (en) * 2017-07-21 2019-01-24 Husky Injection Molding Systems Ltd. Programming a protection device for a molding machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820464A (en) * 1984-07-19 1989-04-11 Toshiba Kikai Kabushiki Kaisha Method for controlling injection molding machine
US5371450A (en) * 1992-08-10 1994-12-06 Sumitomo Heavy Industries, Ltd. Control unit capable of smoothly carrying out a switching operation between position and pressure feedback control systems
JPH08323824A (en) * 1995-05-31 1996-12-10 Fanuc Ltd Controlling method for injection molder
US20020005598A1 (en) * 2000-07-17 2002-01-17 Akira Kanda Method of controlling the screw of injection molding machine
JP2005035039A (en) * 2003-07-16 2005-02-10 Toshiba Mach Co Ltd Screw control method for injection molding machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930774A (en) * 1973-07-24 1976-01-06 Industrial Nucleonics Corporation Extruder controller
US4135873A (en) * 1975-08-05 1979-01-23 Toshiba Kikai Kabushiki Kaisha Apparatus for controlling injection molding machines
US4841208A (en) * 1986-09-11 1989-06-20 Toshiba Kikai Kabushi Kaisha Position control system including a quick response control
JP2799689B2 (en) * 1995-05-26 1998-09-21 日精樹脂工業株式会社 Program setting method for control device for injection molding machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820464A (en) * 1984-07-19 1989-04-11 Toshiba Kikai Kabushiki Kaisha Method for controlling injection molding machine
US5371450A (en) * 1992-08-10 1994-12-06 Sumitomo Heavy Industries, Ltd. Control unit capable of smoothly carrying out a switching operation between position and pressure feedback control systems
JPH08323824A (en) * 1995-05-31 1996-12-10 Fanuc Ltd Controlling method for injection molder
US20020005598A1 (en) * 2000-07-17 2002-01-17 Akira Kanda Method of controlling the screw of injection molding machine
JP2002028960A (en) * 2000-07-17 2002-01-29 Toshiba Mach Co Ltd Method for controlling screw of injection molding machine
JP2005035039A (en) * 2003-07-16 2005-02-10 Toshiba Mach Co Ltd Screw control method for injection molding machine

Also Published As

Publication number Publication date
US20060216370A1 (en) 2006-09-28
US7344369B2 (en) 2008-03-18
CN1840315A (en) 2006-10-04
EP1708060A2 (en) 2006-10-04
EP1708060B1 (en) 2012-02-29
JP4168039B2 (en) 2008-10-22
JP2006272646A (en) 2006-10-12
CN100515725C (en) 2009-07-22

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